NOTE: Save this master file as a new name and than use new file to do the calculations.
Step 1: Define Bolt & Nut (Boss)
Bolt P/N:
a Method 1: Maximum bolt load based upon shear stress in the bolt thread .
Shear Area, bolt (mm 2
)A s Tensile Load, bolt (N)
P s
a Method 2: Maximum bolt load based upon shear stress in the internal thread .
Shear Area, nut (mm 2)
A i Tensile Load, nut (N)
P i
a Method 3: Maximum bolt load based on tensile failure of bolt .
Tensile stress area, bolt A t Tensile load, bolt (N)
P t a Result : Maximum allowable torque based upon minimum bolt load of 3 methods.
Applicable Load (N)Fi Torque (N.M)
T
Step 3: If there are any thermal effects in the assembly a temperature correction factor may need to be applied to the proof or yield strength.Step 4: Use this torque as a conservative value.
Step 5: If higher torque is required, conduct torque tests and evaluate hardware for yield.
5088.7479
0.2
176513.4521
1682.53725761.1558604397.6152
27.98815088.75
.ê??è?è
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o do the calculations.
of 3 methods.
ure correction factor
uate hardware for yield.
()ú?ù
ê?é-°+=
m ax ,1m in ,2m ax ,130tan 2D d P P D L e s
A
p ()ú?
ùê?é-°+=
m ax ,2m in m ax 30tan 2D d P P d L e i
A
p b
i D KF T =F
A S P
s
i
i
i
577
.0=F
A S P
s
s
t
s
577
.0=2
16/260tan 32/260tan 75.úú?
ùêê?é÷???è?°-÷÷????è?÷÷????è?°-=÷÷÷?????è?P P D A b t p s
t t t F A S P /=